The Argentine shot stopper, 32, reunites with City boss Manuel Pellegrini having worked together at Malaga, and follows Bacary Sagna and Fernando to the Premier League Champions. City have paid a £6m fee to land the former Elche goalkeeper, who was inexplicably left out of Argentina's World Cup squad by manager Alejandro Sabella.

"I am very happy, and really looking forward to the start of pre-season and performing well to help the team. This is a new challenge and a new league for me. I have been doing well in the previous years and my goal is to go on and hopefully perform at the same level for City," he said.

"I know I am coming to a big club with a very good goalkeeper. City already have a great goalkeeper in Joe Hart, but I will try and compete for the no.1 spot. I will do my best in the training sessions," added Caballero.

City fans reacted well to the signing on Twitter, and particularly to the bizarre choice of hashtag from the club - #WelcomeWilly - but the less said about that, the better. Here are some of the tweets from City fans who are reacting to Caballero's arrival today.

Willy Caballero to #MCFC , smooth pick up for a back up GK. Small contract and he's an Argentine who's played under Pellegrini. #Chemistry

Olly Dawes

Olly is a Sports Management graduate and aspiring journalist, with most of his work surrounding football or NFL. He has formed two of his own sites, as well as contributing to a number of others before starting with Here Is The City.